Finding the Fourth Proportional to 142.48, 196.56 and 101.12

Step by Step Solution

1. Step 1: Write the proportion equation
   142.48 : 196.56 = 101.12 : x
2. Step 2: Convert to fraction form
   142.48/196.56 = 101.12/x
3. Step 3: Cross multiply
   142.48x = 196.56 × 101.12
4. Step 4: Simplify right side
   142.48x = 19,876.15
5. Step 5: Solve for x
   x = 19,876.15/142.48
6. Step 6: Final answer
   x = 139.50